Tribological Properties of ZrO2 Coating on the Ball Joint of an Axial Piston Pump in High Water-Based Emulsion Medium

Figure 5

Wear condition of two kinds of materials under different emulsion concentrations. (a) 2D and 3D morphology of wear marks on steel-steel pairs. (b) Wear depth curve of ceramic-ceramic pair under different emulsion concentration (100 N 1 Hz).

(a)

(b)